A Ukrainian sailor smiles as he looks out of a window near the entrance to the General Staff Headquarters of the Ukrainian Navy, as an unidentified soldier stands outside in Sevastopol, Monday, March 3, 2014.

Ukrainian seamen stand guard on the Ukrainian navy ship Slavutich in Sevastopol, Ukraine, Monday, March 3, 2014. The Ukrainian Defense Ministry said that Russian forces that have overtaken Ukraine's strategic region of Crimea are demanding that the ship's crew surrender.

Ukrainian soldiers gather near the bath house in the General Staff Headquarters of the Ukrainian Navy in Sevastopol, Ukraine, Monday, March 3, 2014. Russian Foreign Minister Sergey Lavrov on Monday justified the use of Russian troops streaming into neighboring Ukraine's Crimea region as a necessary protection for his country's citizens living there.

Unidentified gunmen stand outside entrance to the General Staff Headquarters of the Ukrainian Navy in Sevastopol, Ukraine, Monday, March 3, 2014. Pro-Russian soldiers moved to further cement their control over the strategic region, that also houses the Russian Black Sea Fleet, by seizing a ferry terminal in the Ukrainian city of Kerch about 20 kilometers by boat to Russia, intensifying fears that Moscow will send even more troops into the peninsula.

A man wearing the Russian national flag walks past an entrance to the General Staff Headquarters of the Ukrainian Navy as unidentified gunmen stand outside in Sevastopol, Ukraine, Monday, March 3, 2014.